762ac725bf
Fixes a bug in the DAG combiner that eliminates the stores because it missed to inspect the address space of the pointers. %v = load %ptr_as1 // no chain side effect store %v, %ptr_as2 As well as store %v, %ptr_as1 store %v, %ptr_as2 Fixes a test for above in X86. Differential Revision: https://reviews.llvm.org/D102096
89 lines
2.9 KiB
LLVM
89 lines
2.9 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mtriple=i686-pc-linux | FileCheck %s
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; Checks that the stores aren't eliminated by the DAG combiner, because the address
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; spaces are different. In X86, we're checking this for the non-zero address space :fs.
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; The test's 'same' and 'diff' notation depicts whether the pointer value is the same
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; or different.
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define i32 @copy_fs_same() {
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; CHECK-LABEL: copy_fs_same:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: movl 1, %eax
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; CHECK-NEXT: movl %eax, %fs:1
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; CHECK-NEXT: retl
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entry:
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%0 = load i32, i32* inttoptr (i64 1 to i32*), align 4
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store i32 %0, i32 addrspace(257)* inttoptr (i64 1 to i32 addrspace(257)*), align 4
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ret i32 %0
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}
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define i32 @copy_fs_diff() {
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; CHECK-LABEL: copy_fs_diff:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: movl 1, %eax
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; CHECK-NEXT: movl %eax, %fs:2
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; CHECK-NEXT: retl
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entry:
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%0 = load i32, i32* inttoptr (i64 1 to i32*), align 4
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store i32 %0, i32 addrspace(257)* inttoptr (i64 2 to i32 addrspace(257)*), align 4
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ret i32 %0
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}
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define void @output_fs_same(i32 %v) {
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; CHECK-LABEL: output_fs_same:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: movl {{[0-9]+}}(%esp), %eax
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; CHECK-NEXT: movl %eax, 1
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; CHECK-NEXT: movl %eax, %fs:1
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; CHECK-NEXT: retl
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entry:
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store i32 %v, i32* inttoptr (i64 1 to i32*), align 4
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store i32 %v, i32 addrspace(257)* inttoptr (i64 1 to i32 addrspace(257)*), align 4
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ret void
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}
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define void @output_fs_diff(i32 %v) {
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; CHECK-LABEL: output_fs_diff:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: movl {{[0-9]+}}(%esp), %eax
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; CHECK-NEXT: movl %eax, 1
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; CHECK-NEXT: movl %eax, %fs:2
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; CHECK-NEXT: retl
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entry:
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store i32 %v, i32* inttoptr (i64 1 to i32*), align 4
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store i32 %v, i32 addrspace(257)* inttoptr (i64 2 to i32 addrspace(257)*), align 4
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ret void
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}
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define void @output_indexed_fs_same(i32 %v, i32* %b) {
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; CHECK-LABEL: output_indexed_fs_same:
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; CHECK: # %bb.0:
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; CHECK-NEXT: movl {{[0-9]+}}(%esp), %eax
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; CHECK-NEXT: movl {{[0-9]+}}(%esp), %ecx
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; CHECK-NEXT: movl %eax, 168(%ecx)
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; CHECK-NEXT: movl %eax, %fs:168(%ecx)
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; CHECK-NEXT: retl
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%p = getelementptr i32, i32* %b, i64 42
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%pa = addrspacecast i32* %p to i32 addrspace(257)*
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store i32 %v, i32* %p, align 4
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store i32 %v, i32 addrspace(257)* %pa, align 4
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ret void
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}
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define void @output_indexed_fs_diff(i32 %v, i32* %b) {
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; CHECK-LABEL: output_indexed_fs_diff:
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; CHECK: # %bb.0:
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; CHECK-NEXT: movl {{[0-9]+}}(%esp), %eax
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; CHECK-NEXT: movl {{[0-9]+}}(%esp), %ecx
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; CHECK-NEXT: movl %eax, 168(%ecx)
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; CHECK-NEXT: movl %eax, %fs:184(%ecx)
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; CHECK-NEXT: retl
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%p = getelementptr i32, i32* %b, i64 42
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%pa = addrspacecast i32* %p to i32 addrspace(257)*
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%pad = getelementptr i32, i32 addrspace(257)* %pa, i64 4
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store i32 %v, i32* %p, align 4
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store i32 %v, i32 addrspace(257)* %pad, align 4
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ret void
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}
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