mirror of
https://github.com/RPCSX/llvm.git
synced 2024-12-23 04:28:40 +00:00
33a530fbed
This is a recommit of r258620 which causes PR26293.
The original message:
Now LIR can turn following codes into memset:
typedef struct foo {
int a;
int b;
} foo_t;
void bar(foo_t *f, unsigned n) {
for (unsigned i = 0; i < n; ++i) {
f[i].a = 0;
f[i].b = 0;
}
}
void test(foo_t *f, unsigned n) {
for (unsigned i = 0; i < n; i += 2) {
f[i] = 0;
f[i+1] = 0;
}
}
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@258777 91177308-0d34-0410-b5e6-96231b3b80d8
222 lines
7.7 KiB
LLVM
222 lines
7.7 KiB
LLVM
; RUN: opt -basicaa -loop-idiom < %s -S | FileCheck %s
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
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target triple = "x86_64-apple-darwin10.0.0"
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%struct.foo = type { i32, i32 }
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%struct.foo1 = type { i32, i32, i32 }
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%struct.foo2 = type { i32, i16, i16 }
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;void bar1(foo_t *f, unsigned n) {
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; for (unsigned i = 0; i < n; ++i) {
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; f[i].a = 0;
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; f[i].b = 0;
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; }
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;}
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define void @bar1(%struct.foo* %f, i32 %n) nounwind ssp {
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entry:
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%cmp1 = icmp eq i32 %n, 0
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br i1 %cmp1, label %for.end, label %for.body.preheader
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for.body.preheader: ; preds = %entry
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br label %for.body
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for.body: ; preds = %for.body.preheader, %for.body
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%indvars.iv = phi i64 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ]
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%a = getelementptr inbounds %struct.foo, %struct.foo* %f, i64 %indvars.iv, i32 0
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store i32 0, i32* %a, align 4
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%b = getelementptr inbounds %struct.foo, %struct.foo* %f, i64 %indvars.iv, i32 1
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store i32 0, i32* %b, align 4
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%lftr.wideiv = trunc i64 %indvars.iv.next to i32
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%exitcond = icmp ne i32 %lftr.wideiv, %n
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br i1 %exitcond, label %for.body, label %for.end.loopexit
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for.end.loopexit: ; preds = %for.body
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br label %for.end
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for.end: ; preds = %for.end.loopexit, %entry
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ret void
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; CHECK-LABEL: @bar1(
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; CHECK: call void @llvm.memset
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; CHECK-NOT: store
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}
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;void bar2(foo_t *f, unsigned n) {
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; for (unsigned i = 0; i < n; ++i) {
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; f[i].b = 0;
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; f[i].a = 0;
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; }
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;}
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define void @bar2(%struct.foo* %f, i32 %n) nounwind ssp {
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entry:
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%cmp1 = icmp eq i32 %n, 0
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br i1 %cmp1, label %for.end, label %for.body.preheader
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for.body.preheader: ; preds = %entry
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br label %for.body
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for.body: ; preds = %for.body.preheader, %for.body
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%indvars.iv = phi i64 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ]
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%b = getelementptr inbounds %struct.foo, %struct.foo* %f, i64 %indvars.iv, i32 1
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store i32 0, i32* %b, align 4
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%a = getelementptr inbounds %struct.foo, %struct.foo* %f, i64 %indvars.iv, i32 0
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store i32 0, i32* %a, align 4
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%lftr.wideiv = trunc i64 %indvars.iv.next to i32
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%exitcond = icmp ne i32 %lftr.wideiv, %n
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br i1 %exitcond, label %for.body, label %for.end.loopexit
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for.end.loopexit: ; preds = %for.body
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br label %for.end
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for.end: ; preds = %for.end.loopexit, %entry
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ret void
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; CHECK-LABEL: @bar2(
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; CHECK: call void @llvm.memset
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; CHECK-NOT: store
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}
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;void bar3(foo_t *f, unsigned n) {
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; for (unsigned i = n; i > 0; --i) {
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; f[i].a = 0;
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; f[i].b = 0;
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; }
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;}
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define void @bar3(%struct.foo* nocapture %f, i32 %n) nounwind ssp {
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entry:
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%cmp1 = icmp eq i32 %n, 0
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br i1 %cmp1, label %for.end, label %for.body.preheader
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for.body.preheader: ; preds = %entry
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%0 = zext i32 %n to i64
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br label %for.body
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for.body: ; preds = %for.body.preheader, %for.body
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%indvars.iv = phi i64 [ %0, %for.body.preheader ], [ %indvars.iv.next, %for.body ]
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%a = getelementptr inbounds %struct.foo, %struct.foo* %f, i64 %indvars.iv, i32 0
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store i32 0, i32* %a, align 4
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%b = getelementptr inbounds %struct.foo, %struct.foo* %f, i64 %indvars.iv, i32 1
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store i32 0, i32* %b, align 4
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%1 = trunc i64 %indvars.iv to i32
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%dec = add i32 %1, -1
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%cmp = icmp eq i32 %dec, 0
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%indvars.iv.next = add nsw i64 %indvars.iv, -1
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br i1 %cmp, label %for.end.loopexit, label %for.body
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for.end.loopexit: ; preds = %for.body
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br label %for.end
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for.end: ; preds = %for.end.loopexit, %entry
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ret void
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; CHECK-LABEL: @bar3(
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; CHECK: call void @llvm.memset
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; CHECK-NOT: store
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}
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;void bar4(foo_t *f, unsigned n) {
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; for (unsigned i = 0; i < n; ++i) {
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; f[i].a = 0;
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; f[i].b = 1;
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; }
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;}
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define void @bar4(%struct.foo* nocapture %f, i32 %n) nounwind ssp {
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entry:
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%cmp1 = icmp eq i32 %n, 0
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br i1 %cmp1, label %for.end, label %for.body.preheader
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for.body.preheader: ; preds = %entry
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br label %for.body
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for.body: ; preds = %for.body.preheader, %for.body
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%indvars.iv = phi i64 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ]
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%a = getelementptr inbounds %struct.foo, %struct.foo* %f, i64 %indvars.iv, i32 0
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store i32 0, i32* %a, align 4
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%b = getelementptr inbounds %struct.foo, %struct.foo* %f, i64 %indvars.iv, i32 1
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store i32 1, i32* %b, align 4
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%lftr.wideiv = trunc i64 %indvars.iv.next to i32
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%exitcond = icmp ne i32 %lftr.wideiv, %n
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br i1 %exitcond, label %for.body, label %for.end.loopexit
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for.end.loopexit: ; preds = %for.body
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br label %for.end
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for.end: ; preds = %for.end.loopexit, %entry
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ret void
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; CHECK-LABEL: @bar4(
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; CHECK-NOT: call void @llvm.memset
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}
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;void bar5(foo1_t *f, unsigned n) {
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; for (unsigned i = 0; i < n; ++i) {
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; f[i].a = 0;
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; f[i].b = 0;
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; }
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;}
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define void @bar5(%struct.foo1* nocapture %f, i32 %n) nounwind ssp {
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entry:
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%cmp1 = icmp eq i32 %n, 0
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br i1 %cmp1, label %for.end, label %for.body.preheader
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for.body.preheader: ; preds = %entry
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br label %for.body
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for.body: ; preds = %for.body.preheader, %for.body
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%indvars.iv = phi i64 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ]
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%a = getelementptr inbounds %struct.foo1, %struct.foo1* %f, i64 %indvars.iv, i32 0
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store i32 0, i32* %a, align 4
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%b = getelementptr inbounds %struct.foo1, %struct.foo1* %f, i64 %indvars.iv, i32 1
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store i32 0, i32* %b, align 4
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%lftr.wideiv = trunc i64 %indvars.iv.next to i32
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%exitcond = icmp ne i32 %lftr.wideiv, %n
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br i1 %exitcond, label %for.body, label %for.end.loopexit
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for.end.loopexit: ; preds = %for.body
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br label %for.end
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for.end: ; preds = %for.end.loopexit, %entry
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ret void
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; CHECK-LABEL: @bar5(
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; CHECK-NOT: call void @llvm.memset
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}
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;void bar6(foo2_t *f, unsigned n) {
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; for (unsigned i = 0; i < n; ++i) {
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; f[i].a = 0;
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; f[i].b = 0;
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; f[i].c = 0;
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; }
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;}
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define void @bar6(%struct.foo2* nocapture %f, i32 %n) nounwind ssp {
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entry:
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%cmp1 = icmp eq i32 %n, 0
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br i1 %cmp1, label %for.end, label %for.body.preheader
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for.body.preheader: ; preds = %entry
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br label %for.body
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for.body: ; preds = %for.body.preheader, %for.body
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%indvars.iv = phi i64 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ]
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%a = getelementptr inbounds %struct.foo2, %struct.foo2* %f, i64 %indvars.iv, i32 0
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store i32 0, i32* %a, align 4
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%b = getelementptr inbounds %struct.foo2, %struct.foo2* %f, i64 %indvars.iv, i32 1
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store i16 0, i16* %b, align 4
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%c = getelementptr inbounds %struct.foo2, %struct.foo2* %f, i64 %indvars.iv, i32 2
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store i16 0, i16* %c, align 2
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%lftr.wideiv = trunc i64 %indvars.iv.next to i32
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%exitcond = icmp ne i32 %lftr.wideiv, %n
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br i1 %exitcond, label %for.body, label %for.end.loopexit
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for.end.loopexit: ; preds = %for.body
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br label %for.end
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for.end: ; preds = %for.end.loopexit, %entry
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ret void
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; CHECK-LABEL: @bar6(
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; CHECK: call void @llvm.memset
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; CHECK-NOT: store
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}
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