Chris Lattner 19a5dc488b optimize bitcast(trunc(bitcast(x))) where the result is a float and 'x' ... is a vector to be a vector element extraction. This allows clang to compile: struct S { float A, B, C, D; }; float foo(struct S A) { return A.A + A.B+A.C+A.D; } into: _foo: ## @foo ## BB#0: ## %entry movd %xmm0, %rax shrq $32, %rax movd %eax, %xmm2 addss %xmm0, %xmm2 movapd %xmm1, %xmm3 addss %xmm2, %xmm3 movd %xmm1, %rax shrq $32, %rax movd %eax, %xmm0 addss %xmm3, %xmm0 ret instead of: _foo: ## @foo ## BB#0: ## %entry movd %xmm0, %rax movd %eax, %xmm0 shrq $32, %rax movd %eax, %xmm2 addss %xmm0, %xmm2 movd %xmm1, %rax movd %eax, %xmm1 addss %xmm2, %xmm1 shrq $32, %rax movd %eax, %xmm0 addss %xmm1, %xmm0 ret ... eliminating half of the horribleness. llvm-svn: 112227		2010-08-26 21:55:42 +00:00
..
Analysis	In the default address space, any GEP off of null results in a trap value if you try to load it. Thus,	2010-08-25 01:16:47 +00:00
Archive	Eliminate some unnessary Path::exists() calls.	2010-05-27 20:51:54 +00:00
AsmParser	Add a comment explaining why this code doesn't just call	2010-08-24 14:35:45 +00:00
Bitcode	Add a FIXME comment.	2010-08-25 20:23:38 +00:00
CodeGen	Speculatively revert r112207.	2010-08-26 20:33:42 +00:00
CompilerDriver	Add a TODO.	2010-08-23 19:24:12 +00:00
ExecutionEngine	remove some dead code.	2010-08-23 03:12:06 +00:00
Linker	Reapply r112091 and r111922, support for metadata linking, with a	2010-08-26 15:41:53 +00:00
MC	MCELF: Fix a thinko of mine.	2010-08-26 18:12:04 +00:00
Support	StringRef::compare_numeric also differed from StringRef::compare for characters > 127.	2010-08-26 15:25:35 +00:00
System	Fix --disable-threads build, PR7949.	2010-08-20 20:54:37 +00:00
Target	Turn off the scavenging based frame reg reuse briefly to measure whether it's	2010-08-26 21:29:54 +00:00
Transforms	optimize bitcast(trunc(bitcast(x))) where the result is a float and 'x'	2010-08-26 21:55:42 +00:00
VMCore	Don't include the is-function-local bit in the FoldingSetNodeID	2010-08-24 23:21:12 +00:00
Makefile