80 lines
2.7 KiB
LLVM
80 lines
2.7 KiB
LLVM
; RUN: llc -verify-machineinstrs -mcpu=pwr7 -code-model=medium <%s | FileCheck %s
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; RUN: llc -verify-machineinstrs -mcpu=pwr7 -code-model=large <%s | FileCheck -check-prefix=LARGE %s
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; Test correct code generation for medium and large code model
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; for loading the address of a jump table from the TOC.
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target datalayout = "E-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-f128:128:128-v128:128:128-n32:64"
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target triple = "powerpc64-unknown-linux-gnu"
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define signext i32 @test_jump_table(i32 signext %i) nounwind {
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entry:
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%i.addr = alloca i32, align 4
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store i32 %i, i32* %i.addr, align 4
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%0 = load i32, i32* %i.addr, align 4
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switch i32 %0, label %sw.default [
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i32 3, label %sw.bb
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i32 4, label %sw.bb1
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i32 5, label %sw.bb2
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i32 6, label %sw.bb3
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]
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sw.default: ; preds = %entry
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br label %sw.epilog
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sw.bb: ; preds = %entry
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%1 = load i32, i32* %i.addr, align 4
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%mul = mul nsw i32 %1, 7
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store i32 %mul, i32* %i.addr, align 4
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br label %sw.bb1
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sw.bb1: ; preds = %entry, %sw.bb
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%2 = load i32, i32* %i.addr, align 4
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%dec = add nsw i32 %2, -1
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store i32 %dec, i32* %i.addr, align 4
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br label %sw.bb2
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sw.bb2: ; preds = %entry, %sw.bb1
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%3 = load i32, i32* %i.addr, align 4
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%add = add nsw i32 %3, 3
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store i32 %add, i32* %i.addr, align 4
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br label %sw.bb3
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sw.bb3: ; preds = %entry, %sw.bb2
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%4 = load i32, i32* %i.addr, align 4
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%shl = shl i32 %4, 1
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store i32 %shl, i32* %i.addr, align 4
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br label %sw.epilog
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sw.epilog: ; preds = %sw.bb3, %sw.default
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%5 = load i32, i32* %i.addr, align 4
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ret i32 %5
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}
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; CHECK-LABEL: test_jump_table:
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; CHECK-NOT: bl .L0$pb
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; CHECK: addis [[REG1:[0-9]+]], 2, .LC[[TOCNUM:[0-9]+]]@toc@ha
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; CHECK: ld [[REG2:[0-9]+]], .LC[[TOCNUM]]@toc@l([[REG1]])
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; CHECK: lwax [[REG3:[0-9]+]], {{[0-9]+}}, [[REG2]]
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; CHECK-NEXT: add [[REG4:[0-9]+]], [[REG3]], [[REG2]]
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; CHECK-NEXT: mtctr [[REG4]]
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; CHECK-NEXT: bctr
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; CHECK-LABEL: .LJTI0_0:
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; CHECK-NEXT: .long .LBB0_{{[0-9]+}}-.LJTI0_0
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; LARGE-LABEL: test_jump_table:
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; LARGE: bl .L0$pb
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; LARGE-NEXT: .L0$pb:
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; LARGE: mflr [[REGBASE:[0-9]+]]
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; LARGE: addis [[REG1:[0-9]+]], 2, .LC[[TOCNUM:[0-9]+]]@toc@ha
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; LARGE: ld [[REG2:[0-9]+]], .LC[[TOCNUM]]@toc@l([[REG1]])
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; LARGE: lwax [[REG3:[0-9]+]], {{[0-9]+}}, [[REG2]]
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; LARGE-NEXT: add [[REG4:[0-9]+]], [[REG3]], [[REGBASE]]
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; LARGE-NEXT: mtctr [[REG4]]
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; LARGE-NEXT: bctr
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; LARGE-LABEL: .LJTI0_0:
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; LARGE-NEXT: .long .LBB0_{{[0-9]+}}-.L0$pb
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