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Remove a completed optimization. Add a potential optimization I ran

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llvm-svn: 71352
This commit is contained in:
Eli Friedman 2009-05-09 08:40:15 +00:00
parent f7af13b2d4
commit 69845a85a5
1 changed files with 9 additions and 17 deletions
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26
lib/Target/README.txt
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@ -909,23 +909,6 @@ multiply hi's into a comparison against the mullo.
//===---------------------------------------------------------------------===//
SROA is not promoting the union on the stack in this example, we should end
up with no allocas.
union vec2d {
double e[2];
double v __attribute__((vector_size(16)));
};
typedef union vec2d vec2d;
static vec2d a={{1,2}}, b={{3,4}};
vec2d foo () {
return (vec2d){ .v = a.v + b.v * (vec2d){{5,5}}.v };
}
//===---------------------------------------------------------------------===//
Better mod/ref analysis for scanf would allow us to eliminate the vtable and a
bunch of other stuff from this example (see PR1604):
@ -1725,3 +1708,12 @@ The arg promotion pass should make use of nocapture to make its alias analysis
stuff much more precise.
//===---------------------------------------------------------------------===//
The following functions should be optimized to use a select instead of a
branch (from gcc PR40072):
char char_int(int m) {if(m>7) return 0; return m;}
int int_char(char m) {if(m>7) return 0; return m;}
//===---------------------------------------------------------------------===//