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Differential D120192 Diff 410095 llvm/test/CodeGen/X86/load-combine.ll

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llvm/test/CodeGen/X86/load-combine.ll

Show First 20 Lines • Show All 1,203 Lines • ▼ Show 20 Lines; CHECK64-NEXT: retq
%tmp7 = shl nuw nsw i32 %tmp6, 24 %tmp7 = shl nuw nsw i32 %tmp6, 24
%tmp8 = or i32 %tmp7, %tmp30 %tmp8 = or i32 %tmp7, %tmp30
ret i32 %tmp8 ret i32 %tmp8
} }
; i8* p; ; i8* p;
; (i32) p[1] | ((i32) p[0] << 8) ; (i32) p[1] | ((i32) p[0] << 8)
define i32 @zext_load_i32_by_i8_bswap(i32* %arg) { define i32 @zext_load_i32_by_i8_bswap(i32* %arg) {
; CHECK-LABEL: zext_load_i32_by_i8_bswap: ; BSWAP-LABEL: zext_load_i32_by_i8_bswap:
; CHECK: # %bb.0: ; BSWAP: # %bb.0:
; CHECK-NEXT: movl {{[0-9]+}}(%esp), %eax ; BSWAP-NEXT: movl {{[0-9]+}}(%esp), %eax
; CHECK-NEXT: movzwl (%eax), %eax ; BSWAP-NEXT: movzwl (%eax), %eax
; CHECK-NEXT: shll $16, %eax ; BSWAP-NEXT: rolw $8, %ax
; CHECK-NEXT: bswapl %eax ; BSWAP-NEXT: movzwl %ax, %eax
; CHECK-NEXT: retl ; BSWAP-NEXT: retl
; ;
; CHECK64-LABEL: zext_load_i32_by_i8_bswap: ; MOVBE-LABEL: zext_load_i32_by_i8_bswap:
; CHECK64: # %bb.0: ; MOVBE: # %bb.0:
; CHECK64-NEXT: movzwl (%rdi), %eax ; MOVBE-NEXT: movl {{[0-9]+}}(%esp), %eax
; CHECK64-NEXT: shll $16, %eax ; MOVBE-NEXT: movbew (%eax), %ax
; CHECK64-NEXT: bswapl %eax ; MOVBE-NEXT: movzwl %ax, %eax
; CHECK64-NEXT: retq ; MOVBE-NEXT: retl
;
; BSWAP64-LABEL: zext_load_i32_by_i8_bswap:
; BSWAP64: # %bb.0:
; BSWAP64-NEXT: movzwl (%rdi), %eax
; BSWAP64-NEXT: rolw $8, %ax
; BSWAP64-NEXT: movzwl %ax, %eax
; BSWAP64-NEXT: retq
;
; MOVBE64-LABEL: zext_load_i32_by_i8_bswap:
; MOVBE64: # %bb.0:
; MOVBE64-NEXT: movbew (%rdi), %ax
; MOVBE64-NEXT: movzwl %ax, %eax
; MOVBE64-NEXT: retq
%tmp = bitcast i32* %arg to i8* %tmp = bitcast i32* %arg to i8*
%tmp1 = getelementptr inbounds i8, i8* %tmp, i32 1 %tmp1 = getelementptr inbounds i8, i8* %tmp, i32 1
%tmp2 = load i8, i8* %tmp1, align 1 %tmp2 = load i8, i8* %tmp1, align 1
%tmp3 = zext i8 %tmp2 to i32 %tmp3 = zext i8 %tmp2 to i32
%tmp4 = getelementptr inbounds i8, i8* %tmp, i32 0 %tmp4 = getelementptr inbounds i8, i8* %tmp, i32 0
%tmp5 = load i8, i8* %tmp4, align 1 %tmp5 = load i8, i8* %tmp4, align 1
%tmp6 = zext i8 %tmp5 to i32 %tmp6 = zext i8 %tmp5 to i32
%tmp7 = shl nuw nsw i32 %tmp6, 8 %tmp7 = shl nuw nsw i32 %tmp6, 8
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