llvm-6502/test/CodeGen/X86/fast-isel-gep.ll

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; RUN: llc < %s -mtriple=x86_64-linux -O0 | FileCheck %s --check-prefix=X64
; RUN: llc < %s -mtriple=x86_64-win32 -O0 | FileCheck %s --check-prefix=X64
; RUN: llc < %s -march=x86 -O0 | FileCheck %s --check-prefix=X32
; GEP indices are interpreted as signed integers, so they
; should be sign-extended to 64 bits on 64-bit targets.
; PR3181
define i32 @test1(i32 %t3, i32* %t1) nounwind {
%t9 = getelementptr i32* %t1, i32 %t3 ; <i32*> [#uses=1]
%t15 = load i32* %t9 ; <i32> [#uses=1]
ret i32 %t15
; X32: test1:
; X32: movl (%eax,%ecx,4), %eax
; X32: ret
; X64: test1:
; X64: movslq %e[[A0:di|cx]], %rax
; X64: movl (%r[[A1:si|dx]],%rax,4), %eax
; X64: ret
}
define i32 @test2(i64 %t3, i32* %t1) nounwind {
%t9 = getelementptr i32* %t1, i64 %t3 ; <i32*> [#uses=1]
%t15 = load i32* %t9 ; <i32> [#uses=1]
ret i32 %t15
; X32: test2:
; X32: movl (%edx,%ecx,4), %eax
; X32: ret
; X64: test2:
; X64: movl (%r[[A1]],%r[[A0]],4), %eax
; X64: ret
}
; PR4984
define i8 @test3(i8* %start) nounwind {
entry:
%A = getelementptr i8* %start, i64 -2 ; <i8*> [#uses=1]
%B = load i8* %A, align 1 ; <i8> [#uses=1]
ret i8 %B
; X32: test3:
; X32: movl 4(%esp), %eax
; X32: movb -2(%eax), %al
; X32: ret
; X64: test3:
; X64: movb -2(%r[[A0]]), %al
; X64: ret
}
define double @test4(i64 %x, double* %p) nounwind {
entry:
%x.addr = alloca i64, align 8 ; <i64*> [#uses=2]
%p.addr = alloca double*, align 8 ; <double**> [#uses=2]
store i64 %x, i64* %x.addr
store double* %p, double** %p.addr
%tmp = load i64* %x.addr ; <i64> [#uses=1]
%add = add nsw i64 %tmp, 16 ; <i64> [#uses=1]
%tmp1 = load double** %p.addr ; <double*> [#uses=1]
%arrayidx = getelementptr inbounds double* %tmp1, i64 %add ; <double*> [#uses=1]
%tmp2 = load double* %arrayidx ; <double> [#uses=1]
ret double %tmp2
; X32: test4:
; X32: 128(%e{{.*}},%e{{.*}},8)
; X64: test4:
; X64: 128(%r{{.*}},%r{{.*}},8)
}
; PR8961 - Make sure the sext for the GEP addressing comes before the load that
; is folded.
define i64 @test5(i8* %A, i32 %I, i64 %B) nounwind {
%v8 = getelementptr i8* %A, i32 %I
%v9 = bitcast i8* %v8 to i64*
%v10 = load i64* %v9
%v11 = add i64 %B, %v10
ret i64 %v11
; X64: test5:
; X64: movslq %e[[A1]], %rax
; X64-NEXT: movq (%r[[A0]],%rax), %rax
; X64-NEXT: addq %{{rdx|r8}}, %rax
; X64-NEXT: ret
}