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Daniel Sanders e2a16fdce2 Re-commit: [mips][fastisel] Handle 0-4 arguments without SelectionDAG.
Summary:
Implements fastLowerArguments() to avoid the need to fall back on
SelectionDAG for 0-4 argument functions that don't do tricky things like
passing double in a pair of i32's.

This allows us to move all except one test to -fast-isel-abort=3. The
remaining one has function prototypes of the form 'i32 (i32, double, double)'
which requires floats to be passed in GPR's.

The previous commit had an uninitialized variable that caused the incoming
argument region to have undefined size. This has been fixed.

Reviewers: sdardis

Subscribers: dsanders, llvm-commits, sdardis

Differential Revision: https://reviews.llvm.org/D22680


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@277136 91177308-0d34-0410-b5e6-96231b3b80d8
2016-07-29 12:27:28 +00:00

36 lines
1.0 KiB
LLVM

; RUN: llc -march=mipsel -relocation-model=pic -O0 -fast-isel-abort=3 -mcpu=mips32r2 \
; RUN: < %s | FileCheck %s
; RUN: llc -march=mipsel -relocation-model=pic -O0 -fast-isel-abort=3 -mcpu=mips32 \
; RUN: < %s | FileCheck %s
@f = global float 0x40D6E83280000000, align 4
@d = global double 0x4132D68780000000, align 8
@i_f = common global i32 0, align 4
@i_d = common global i32 0, align 4
@.str = private unnamed_addr constant [5 x i8] c"%i \0A\00", align 1
; Function Attrs: nounwind
define void @ifv() {
entry:
; CHECK-LABEL: .ent ifv
%0 = load float, float* @f, align 4
%conv = fptosi float %0 to i32
; CHECK: trunc.w.s $f[[REG:[0-9]+]], $f{{[0-9]+}}
; CHECK: mfc1 ${{[0-9]+}}, $f[[REG]]
store i32 %conv, i32* @i_f, align 4
ret void
}
; Function Attrs: nounwind
define void @idv() {
entry:
; CHECK-LABEL: .ent idv
%0 = load double, double* @d, align 8
%conv = fptosi double %0 to i32
; CHECK: trunc.w.d $f[[REG:[0-9]+]], $f{{[0-9]+}}
; CHECK: mfc1 ${{[0-9]+}}, $f[[REG]]
store i32 %conv, i32* @i_d, align 4
ret void
}