hanchenye-llvm-project/llvm/test/CodeGen/X86/storetrunc-fp.ll

; RUN: llvm-as < %s | llc -march=x86 | not grep flds

define void @foo(x86_fp80 %a, x86_fp80 %b, float* %fp) {
	%c = add x86_fp80 %a, %b
	%d = fptrunc x86_fp80 %c to float
	store float %d, float* %fp
	ret void
}
This commit changes: 1. Legalize now always promotes truncstore of i1 to i8. 2. Remove patterns and gunk related to truncstore i1 from targets. 3. Rename the StoreXAction stuff to TruncStoreAction in TLI. 4. Make the TLI TruncStoreAction table a 2d table to handle from/to conversions. 5. Mark a wide variety of invalid truncstores as such in various targets, e.g. X86 currently doesn't support truncstore of any of its integer types. 6. Add legalize support for truncstores with invalid value input types. 7. Add a dag combine transform to turn store(truncate) into truncstore when safe. The later allows us to compile CodeGen/X86/storetrunc-fp.ll to: _foo: fldt 20(%esp) fldt 4(%esp) faddp %st(1) movl 36(%esp), %eax fstps (%eax) ret instead of: _foo: subl $4, %esp fldt 24(%esp) fldt 8(%esp) faddp %st(1) fstps (%esp) movl 40(%esp), %eax movss (%esp), %xmm0 movss %xmm0, (%eax) addl $4, %esp ret llvm-svn: 46140 2008-01-18 03:59:44 +08:00			`; RUN: llvm-as < %s \| llc -march=x86 \| not grep flds`

			`define void @foo(x86_fp80 %a, x86_fp80 %b, float* %fp) {`
			`%c = add x86_fp80 %a, %b`
			`%d = fptrunc x86_fp80 %c to float`
			`store float %d, float* %fp`
			`ret void`
			`}`