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Differential D58070 Diff 192859 llvm/trunk/test/CodeGen/X86/constant-combines.ll

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llvm/trunk/test/CodeGen/X86/constant-combines.ll

	; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py			; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
	; RUN: llc < %s \| FileCheck %s			; RUN: llc < %s \| FileCheck %s

	target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"			target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
	target triple = "x86_64-unknown-unknown"			target triple = "x86_64-unknown-unknown"

	define void @PR22524({ float, float }* %arg) {
	; Check that we can materialize the zero constants we store in two places here,
	; and at least form a legal store of the floating point value at the end.
	; The DAG combiner at one point contained bugs that given enough permutations
	; would incorrectly form an illegal operation for the last of these stores when
	; it folded it to a zero too late to legalize the zero store operation. If this
	; ever starts forming a zero store instead of movss, the test case has stopped
	; being useful.
	;
	; CHECK-LABEL: PR22524:
	; CHECK: # %bb.0: # %entry
	; CHECK-NEXT: xorl %eax, %eax
	; CHECK-NEXT: movd %eax, %xmm0
	; CHECK-NEXT: xorps %xmm1, %xmm1
	; CHECK-NEXT: mulss %xmm0, %xmm1
	; CHECK-NEXT: movl $0, (%rdi)
	; CHECK-NEXT: movss %xmm1, 4(%rdi)
	; CHECK-NEXT: retq
	entry:
	%0 = getelementptr inbounds { float, float }, { float, float }* %arg, i32 0, i32 1
	store float 0.000000e+00, float* %0, align 4
	%1 = getelementptr inbounds { float, float }, { float, float }* %arg, i64 0, i32 0
	%2 = bitcast float* %1 to i64*
	%3 = load i64, i64* %2, align 8
	%4 = trunc i64 %3 to i32
	%5 = lshr i64 %3, 32
	%6 = trunc i64 %5 to i32
	%7 = bitcast i32 %6 to float
	%8 = fmul float %7, 0.000000e+00
	%9 = bitcast float* %1 to i32*
	store i32 %6, i32* %9, align 4
	store float %8, float* %0, align 4
	ret void
	}


	define void @bitstore_fold() {			define void @bitstore_fold() {
	; CHECK-LABEL: bitstore_fold:			; CHECK-LABEL: bitstore_fold:
	; CHECK: # %bb.0: # %BB			; CHECK: # %bb.0: # %BB
	; CHECK-NEXT: movl $-2, 0			; CHECK-NEXT: movl $-2, 0
	; CHECK-NEXT: retq			; CHECK-NEXT: retq
	BB:			BB:
	store i32 -1, i32* null			store i32 -1, i32* null
	store i1 false, i1* null			store i1 false, i1* null
	ret void			ret void
	}			}